Zinc-magnesium coating now available for automotive outer panels

Tata Steel has expanded its range of MagiZinc hot-dip galvanised coatings with a Full Finish variant. As a result, the benefits of the zinc-magnesium coatings – such as considerably higher corrosion protection and improved press shop performance, with less downtime – are now also available for automotive outer panels.

Complex shaped outer panels, such as bonnets, doors, body sides, bumpers and tailgates are claimed to be the parts where the benefits are particularly noticeable. MagiZinc Auto’s 25% lower zinc abrasion is said to reduce zinc adhesion as well as tool pollution, extending press operating time by 30%. Another advantage is the enhanced corrosion protection provided by MagiZinc Auto, which is twice that of conventional zinc coatings and is said to be resistant to stone chipping.

Tata Steel is currently working on combining MagiZinc with Serica, its optimised steel surface technology. In addition to the benefits of the zinc-magnesium coating, this combination is claimed to enable vehicle manufacturers to improve the paint appearance of their outer panels and lower their costs. Serica features a guaranteed low waviness of less than 0.40µm at 5% strain after forming and was developed to achieve an outstanding paint appearance for outer panels.

Tom Austin-Morgan

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